Nook
This app can be downloaded even if you don't own a Nook. There are several nice features.
It can be downloaded on multiple devices (laptop, iPad, iPhone, etc.) once you sign into your account, the app will sync and take you to the farthest point you have completed.
You can highlight passages, add notes, add bookmarks, and look up unfamiliar words.
To find free books for the Nook at Barnes and Noble,
This app can be downloaded even if you don't own a Nook. There are several nice features.